5-year-old Harmony Montgomery went missing in 2019, officials now believe she was murdered. Choked-up police chief pleads for public's help in bringing little girl's killer to justice.

Harmony Montgomery went missing in 2019. Now, law enforcement officials in New Hampshire believe the 5-year-old was murdered. On Thursday, police pleaded with the public to help find the little girl's killer.

Authorities suspect Montgomery, at age 5, went missing sometime between Nov. 28 and Dec. 10, 2019. However, the little girl was not formally reported missing until December 2021.

"All of these efforts have led us to conclude that Harmony Montgomery was murdered in Manchester in early December of 2019,” New Hampshire Attorney General John Formella said during a press conference on Thursday. "At this point, while Harmony's remains have not yet been located, we do have multiple sources of investigative information, including just recently confirmed biological evidence, that have led us to this difficult and tragic conclusion."

"We understand that this is truly devastating news for Harmony’s family, friends, and loved ones," Formella continued. "And our hearts go out to them. This is also devastating news for the City of Manchester, for our state, and all who have followed this story. Our work now turns to getting justice for Harmony and all those who loved her."

Distraught Manchester Police Chief Allen Aldenberg expressed that he was "beyond saddened" that the investigation had gone from a missing person case to a suspected homicide.

"As I stated from the beginning of the investigation and throughout, every effort has been made to bring Harmony back home to her family," Aldenberg said. "Our commitment to bring Harmony home has not wavered nor will it. Bringing Harmony home continues to be the number one priority of the Manchester Police Department."

"I myself continue to share the same concerns and still have many remaining questions," Aldenberg added. "However, the homicide of this little girl rests with the person or persons who committed this horrific act. The Manchester Police Department will do everything within the limits of the law to ensure that the responsible person or persons for the murder of Harmony are brought to justice."

"Do it for this little girl. … The time is now," the choked-up police chief said. "Time to step up and do the right thing. Make the call to that tip line or contact the Manchester Police Department any way you see fit. Harmony is a sweet and innocent child who deserves to be brought home to her family and friends."

Full Press Conference: 5-year-old Harmony Montgomery murdered in December 2019, police saywww.youtube.com

Harmony's mother, Crystal Sorey, lost custody of her daughter, but was the one to inform law enforcement that her daughter had gone missing.

At the time of her disappearance, the 5-year-old was living with her father, Adam Montgomery, and stepmother, Kayla Montgomery. Harmony only lived with the married couple for approximately eight months. The couple are now estranged.

Law & Order reported, "In previous statements to law enforcement, Kayla Montgomery allegedly said she last saw Harmony Montgomery while getting ready for a work shift on a morning in the fall of 2019. In early June of this year, the issue of time reared its head again. The stepmother was charged with perjury for allegedly lying to grand jurors about the location of her job and some aspect of the timeline she provided."

In January, Kayla Montgomery was arrested and charged with welfare fraud for collecting food stamps in Harmony's name.

Also in January, Adam Montgomery was arrested and charged with felony second-degree assault for a 2019 incident involving Harmony. Montgomery allegedly struck his daughter in the face, giving her a black eye.

The Boston Globe reported, "Harmony’s father, Adam Montgomery, a transient in New Hampshire with his own history of addiction, wanted custody. But he had a lengthy criminal record that included convictions for an armed attack on two women and for shooting a man in the head during a drug deal just six months before Harmony’s birth."

"In June, police and the FBI searched a home in Manchester where Harmony's father and estranged wife previously lived," WBZ-TV reported. "Investigators were seen bringing a refrigerator in and out of the home."

Neither of the adults have been charged with Harmony Montgomery's disappearance.

Police are begging the public to provide any information on the disappearance or murder of Harmony Montgomery. Anyone with information is urged to contact the Manchester Police tip line at 603-203-6060.

There is a $150,000 reward for tips that lead to the discovery of Harmony or an arrest of the little girl's killer.

NH officials say Harmony Montgomery was murderedwww.youtube.com